:root {
  --bg: #f3f4f6;
  --card: #ffffff;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --text: #111827;
  --muted: #6b7280;
  --teal: #0f766e;
  --teal-soft: #ccfbf1;
  --teal-border: #5eead4;
  --teal-btn: #0d9488;
  --amber: #ea580c;
  --amber-soft: #fff7ed;
  --info: #0369a1;
  --info-soft: #e0f2fe;
  --info-border: #7dd3fc;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --radius: 8px;
  --font: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
}

button,
input,
select,
textarea {
  font: inherit;
}

.app {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1.5px solid var(--teal-border);
  border-radius: 6px;
  color: var(--teal);
  font-weight: 600;
  background: #fff;
  white-space: nowrap;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
}

.help {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

label.field {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 13px;
}

.select,
.input,
.textarea {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 8px 12px;
  background: #fff;
  color: var(--text);
}

.textarea {
  min-height: 88px;
  resize: vertical;
}

.textarea.error {
  border-color: var(--danger);
}

.error-text {
  color: var(--danger);
  font-size: 12px;
  margin: 6px 0 0;
}

.banner {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--info-border);
  background: var(--info-soft);
  color: var(--info);
  font-size: 13px;
  margin-bottom: 16px;
}

.banner strong {
  display: block;
  margin-bottom: 2px;
  color: var(--text);
}

.order-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  background: #f0fdfa;
  border-bottom: none;
}

.order-header .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.order-header .title {
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--teal-border);
  color: var(--teal);
  background: #fff;
}

.badge.amber {
  border-color: #fdba74;
  color: var(--amber);
  background: var(--amber-soft);
}

.shipments {
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  background: #fff;
  padding: 16px;
  margin-bottom: 16px;
}

.shipment {
  margin-bottom: 20px;
}

.shipment:last-child {
  margin-bottom: 0;
}

.shipment-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.shipment-head-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.shipment-head h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
}

.package {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: visible;
  position: relative;
  z-index: 1;
}

.package:hover,
.package:focus-within {
  z-index: 2;
}

.package:last-child {
  margin-bottom: 0;
}

.package-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: #f9fafb;
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
}

.package-head-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.package-title {
  font-weight: 700;
}

.tracking {
  color: var(--teal);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
}

.tracking:hover {
  text-decoration: underline;
}

.pkg-count {
  color: var(--muted);
  font-size: 12px;
}

.prior-refund {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.info-tip {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  cursor: help;
}

.info-tip:hover,
.info-tip:focus,
.info-tip:focus-within {
  z-index: 40;
}

.info-i {
  color: var(--info);
  font-style: normal;
  line-height: 1;
  border-radius: 999px;
  padding: 1px 3px;
}

.info-tip:hover .info-i,
.info-tip:focus .info-i,
.info-tip:focus-within .info-i {
  background: var(--info-soft);
}

.info-tip-panel {
  display: none;
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  z-index: 50;
  width: 260px;
  padding: 10px 12px;
  border-radius: 6px;
  border: 1px solid var(--info-border);
  background: var(--info-soft);
  color: var(--info);
  font-size: 12px;
  line-height: 1.45;
  font-weight: 400;
  box-shadow: 0 8px 20px rgba(3, 105, 161, 0.16);
  pointer-events: none;
}

.info-tip-panel strong {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 700;
  color: var(--info);
}

.info-tip:hover .info-tip-panel,
.info-tip:focus .info-tip-panel,
.info-tip:focus-within .info-tip-panel {
  display: block;
}

.qty-hint-limit {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--amber);
}

.alloc-table {
  width: 100%;
  border-collapse: collapse;
}

.alloc-table th {
  text-align: left;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: #fff;
}

.alloc-table td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
  position: relative;
}

.alloc-table tr:hover td,
.alloc-table tr:focus-within td {
  z-index: 3;
}

.alloc-table tr:last-child td {
  border-bottom: none;
}

.alloc-table tr:last-child td:first-child {
  border-radius: 0 0 0 var(--radius);
}

.alloc-table tr:last-child td:last-child {
  border-radius: 0 0 var(--radius) 0;
}

.alloc-table tr.exhausted {
  background: #fafafa;
}

.item-cell {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.thumb {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  background: #f3f4f6;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  flex-shrink: 0;
}

.item-name {
  font-weight: 600;
}

.item-sku {
  color: var(--muted);
  font-size: 12px;
}

.qty-in-pkg {
  font-weight: 600;
}

.qty-hint {
  display: block;
  font-size: 11px;
  color: var(--muted);
  margin-top: 2px;
}

.select-qty {
  width: 72px;
  padding: 6px 8px;
}

.constraint {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
  max-width: 220px;
}

.constraint.warn {
  color: var(--amber);
}

.checkbox {
  width: 18px;
  height: 18px;
  accent-color: var(--teal-btn);
  cursor: pointer;
}

.footer-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}

.btn {
  border: none;
  border-radius: 6px;
  padding: 10px 16px;
  font-weight: 600;
  cursor: pointer;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--teal-btn);
  color: #fff;
}

.btn-secondary {
  background: #e5e7eb;
  color: var(--text);
}

.total-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border: 1.5px solid var(--teal-border);
  border-radius: var(--radius);
  background: #f0fdfa;
  margin-top: 12px;
}

.total-box .label {
  font-weight: 600;
  color: var(--teal);
}

.total-box .amount {
  font-size: 22px;
  font-weight: 700;
  color: var(--teal);
}

.payload {
  margin-top: 16px;
  padding: 12px;
  background: #111827;
  color: #e5e7eb;
  border-radius: var(--radius);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  white-space: pre-wrap;
  display: none;
}

.payload.show {
  display: block;
}

.principle {
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 16px;
  padding: 10px 12px;
  border-left: 3px solid var(--teal);
  background: #fff;
}

/* Line-level shipping subordinate rows — lightweight add-on */
.ship-row td {
  background: #fafbfc;
  padding-top: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.ship-row td.ship-select {
  padding-left: 28px;
}

.ship-row .ship-cell {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.ship-indent {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.4;
  padding-left: 12px;
  flex-shrink: 0;
}

.ship-body {
  min-width: 0;
}

.ship-name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  font-size: 13px;
  color: var(--text);
}

.ship-icon {
  flex-shrink: 0;
  color: var(--muted);
}

.ship-qty-ctrl {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.ship-qty-label {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.ship-refund-ctrl {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  color: var(--text);
}

.ship-refund-ctrl.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.ship-amount-cell {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.ship-amount-prefix {
  color: var(--muted);
  font-size: 13px;
}

.ship-amount-input {
  width: 88px;
  padding: 6px 8px;
}

.ship-price {
  font-weight: 600;
  color: var(--teal);
}

.muted-cell {
  color: var(--muted);
  font-size: 12px;
}

.order-shipping-card {
  margin-bottom: 16px;
}

.order-ship-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.order-ship-body {
  flex: 1;
  min-width: 0;
}

.order-ship-reason {
  width: 180px;
  flex-shrink: 0;
}

.order-ship-amount {
  font-weight: 700;
  color: var(--teal);
  min-width: 72px;
  text-align: right;
  padding-top: 2px;
}

.totals-breakdown {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.totals-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  background: #fff;
}

.totals-row:last-child {
  border-bottom: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 720px) {
  .alloc-table,
  .alloc-table thead,
  .alloc-table tbody,
  .alloc-table th,
  .alloc-table td,
  .alloc-table tr {
    display: block;
  }

  .alloc-table th {
    display: none;
  }

  .alloc-table td {
    border-bottom: none;
    padding: 6px 12px;
  }

  .alloc-table tr {
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
  }
}